Sharpie pens in range of permanent colours including purple (Weybridge KT13)

I need to cover a couple of accidental bleach stains on a purple T shirt. I have tried various other methods but nothing has so far worked. I understand Sharpie pens are permanent and can be used on fabric successfully so if somebody could let me have or even borrow a purple Sharpie pen I would love be very grateful. Thank you.